Boot



FIG. 1 is a perspective view of the boot.

FIG. 2 is a front elevational view of the boot; and,

FIG. 3 is a side elevational view of the boot with the opposite side being a mirror image of the same.

The top, bottom and back of the boot form no part of the claimed design.

The broken lines form no part of the claimed design. 

The ornamental design for a boot, as shown and described. 